Transcript Grounding Bill Hider, N3RR

Grounding
Bill Hider, N3RR
Grounding =
Controlling
Lightning!
For Protection!
Personnel
Equipment
House/Facility
Specifically, Protect What
@ N3RR?
Personnel in the shack
The Ham Shack/house
Electronic equipment in the
shack (TX, RX, AMPS, PCs,
and the like)
Electronic and Electrical
equipment elsewhere in the
house
Rotors and their
controllers
Antennas
Tower-mounted relay
switchers
Tower
Specifications/Standards
ANSI/TIA/EIA-222-E
Available From: http://global.ihs.com/
Technical
Information/Documentation
http://www.lightningEliminators.com/
www.polyphaser.com
Many others. Search for “Lightning”
Outdoors:
The Ground Grid
Controlling Lightning (Tower)
Controlling Lightning (Tower & Shack)
=
=
=
=
=
=
=
KEY
Common Tie-point
8 Ft ground Rod w/clamp
8 Ft ground Rod w/Cadweld
Elevated guy anchor
1.5 Inch copper strap
# 4 wire
TELCO and AC power entry
125 feet
134 Ft
Tower
52 Ft
Tower
Tel&AC
Not to Scale
SPG
Box
Ham
Shack
House
N3RR – Grounding @ Tower
Lightning protectors:
http://www.polyphaser.com/
Andrew Ground Kits
http://www.andrew.com:
Reference site:
www.erols.com/n3rr
Steel Hoffman Boxes
http://www.hoffmanonline.com/:
PolyPhaser Lightning Protectors:
N3RR – Grounding @ Tower
Tower leg w/ground wires shown
N3RR – Grounding @ Tower
Not shown (on the tower):
MOVs at each Ring Rotor – from each control wire to ground
MOVs at the 80 Meter antenna relay box– from each control wire to
ground
Andrew Ground Kit from each coax to ground as close to each antenna
as possible
N3RR – Grounding @ Guy Anchors
Guy anchor ground wires
N3RR – Grounding – SPG @ House
=
=
=
=
=
Review
=
=
KEY
Common Tie-point
8 Ft ground Rod w/clamp
8 Ft ground Rod w/Cadweld
Elevated guy anchor
1.5 Inch copper strap
# 4 wire
TELCO and AC power entry
125 feet
134 Ft
Tower
52 Ft
Tower
Tel&AC
Not to Scale
SPG
Box
Ham
Shack
House
N3RR – Grounding – SPG @ House
Other Connections
Beverage coax entry & left
side copper ground strap:
Copper strap grounding to 8
ft copper ground rod:
N3RR – Grounding – SPG @ House
Other Connections
Other end of copper ground
strap (after 3 ground rods):
Indoors:
The SPG Grid
SPG Box
(External)
SPG Wall Panel
All equipment grounds
“home-run” to this SPG panel.
All coax passes through this
panel with “double-barrel”
feed-through connectors.
TELCO
& Electric
Ham
Shack
House
N3RR – Grounding –Inside
Electrical box to ground strap connection:
N3RR – Grounding –Inside
SPG panel inside:
N3RR – Grounding – Results
Since November 1994, one IC-781, IC-4KL, 5 Ring Rotors,
One Hy-Gain rotor, 4 Packet Cluster Radios, 2 PCs,
with all antennas hooked up.
Only one failure due to elecrical shock: I left the ground wire off of a
Ring Rotor controller durning a period of 1 week for maintenance
and a nearby lightning strike burned out an internal Zener diode.
NO OTHER FAILURES IN OVER
10 Years CONTINUOUSLY CONNECTED!
N3RR – Grounding – THE END!